838 isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,  in isolate_migratepages_block()  argument
849 	unsigned long start_pfn = low_pfn;  in isolate_migratepages_block()
855 	cc->migrate_pfn = low_pfn;  in isolate_migratepages_block()
881 		next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
885 	for (; low_pfn < end_pfn; low_pfn++) {  in isolate_migratepages_block()
887 		if (skip_on_failure && low_pfn >= next_skip_pfn) {  in isolate_migratepages_block()
906 			next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
914 		if (!(low_pfn % COMPACT_CLUSTER_MAX)) {  in isolate_migratepages_block()
932 		page = pfn_to_page(low_pfn);  in isolate_migratepages_block()
940 		if (!valid_page && (pageblock_aligned(low_pfn) ||  in isolate_migratepages_block()
941 				    low_pfn == cc->zone->zone_start_pfn)) {  in isolate_migratepages_block()
943 				low_pfn = end_pfn;  in isolate_migratepages_block()
966 				low_pfn += compound_nr(page) - 1;  in isolate_migratepages_block()
977 				low_pfn += folio_nr_pages(folio) - 1;  in isolate_migratepages_block()
1004 				low_pfn += (1UL << freepage_order) - 1;  in isolate_migratepages_block()
1022 				low_pfn += (1UL << order) - 1;  in isolate_migratepages_block()
1144 					low_pfn = end_pfn;  in isolate_migratepages_block()
1154 				low_pfn += folio_nr_pages(folio) - 1;  in isolate_migratepages_block()
1163 			low_pfn += folio_nr_pages(folio) - 1;  in isolate_migratepages_block()
1186 			++low_pfn;  in isolate_migratepages_block()
1219 		if (low_pfn < next_skip_pfn) {  in isolate_migratepages_block()
1220 			low_pfn = next_skip_pfn - 1;  in isolate_migratepages_block()
1236 	if (unlikely(low_pfn > end_pfn))  in isolate_migratepages_block()
1237 		low_pfn = end_pfn;  in isolate_migratepages_block()
1257 	if (low_pfn == end_pfn && (!nr_isolated || cc->finish_pageblock)) {  in isolate_migratepages_block()
1260 		update_cached_migrate(cc, low_pfn);  in isolate_migratepages_block()
1263 	trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,  in isolate_migratepages_block()
1271 	cc->migrate_pfn = low_pfn;  in isolate_migratepages_block()
1472 	unsigned long low_pfn, min_pfn, highest = 0;  in fast_isolate_freepages()  local
1497 	low_pfn = pageblock_start_pfn(cc->free_pfn - (distance >> 2));  in fast_isolate_freepages()
1500 	if (WARN_ON_ONCE(min_pfn > low_pfn))  in fast_isolate_freepages()
1501 		low_pfn = min_pfn;  in fast_isolate_freepages()
1535 			if (pfn >= low_pfn) {  in fast_isolate_freepages()
1630 	low_pfn = page_to_pfn(page);  in fast_isolate_freepages()
1631 	fast_isolate_around(cc, low_pfn);  in fast_isolate_freepages()
1645 	unsigned long low_pfn;	     /* lowest pfn scanner is able to scan */  in isolate_freepages()  local
1669 	low_pfn = pageblock_end_pfn(cc->migrate_pfn);  in isolate_freepages()
1677 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1697 				block_start_pfn = max(next_pfn, low_pfn);  in isolate_freepages()
1971 	unsigned long low_pfn;  in isolate_migratepages()  local
1983 	low_pfn = fast_find_migrateblock(cc);  in isolate_migratepages()
1984 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1993 	fast_find_block = low_pfn != cc->migrate_pfn && !cc->fast_search_fail;  in isolate_migratepages()
1996 	block_end_pfn = pageblock_end_pfn(low_pfn);  in isolate_migratepages()
2004 			cc->migrate_pfn = low_pfn = block_end_pfn,  in isolate_migratepages()
2013 		if (!(low_pfn % (COMPACT_CLUSTER_MAX * pageblock_nr_pages)))  in isolate_migratepages()
2034 		if ((pageblock_aligned(low_pfn) ||  in isolate_migratepages()
2035 		     low_pfn == cc->zone->zone_start_pfn) &&  in isolate_migratepages()
2053 		if (isolate_migratepages_block(cc, low_pfn, block_end_pfn,  in isolate_migratepages()